Getting selenium request ,response

Programmer Question

i tried the below code but req/response is not captured??

String trafficOutput = selenium.captureNetworkTraffic("xml");
          selenium.type("q", "selenium rc");
          selenium.click("btnG");
          selenium.waitForPageToLoad("30000");

          selenium.open("/#hl=en&source=hp&q=selenium+rc&btnG=Google
+Search&aq=f&aqi=&aql=&oq=&gs_rfai=&fp=ff64793e1cab64b9");
                selenium.click("//ol[@id='rso']/li[1]/h3/a/em");
                selenium.waitForPageToLoad("30000");
                selenium.click("link=Selenium Core");
                selenium.waitForPageToLoad("30000");
                selenium.click("link=our documentation");
                selenium.waitForPageToLoad("30000");
                selenium.click("link=Projects");
                selenium.waitForPageToLoad("30000");
        //  assertTrue(selenium.isTextPresent("Results * for selenium
rc"));

            String  resposneText =  selenium.getHtmlSource();
             DataOutputStream  dos = new DataOutputStream(new
FileOutputStream("output", true));

              System.out.println("value is-------- "+trafficOutput);
              System.out.println("val is "+resposneText);

               dos.writeBytes(trafficOutput);
                dos.close();

but no req/response this case?? getting value for
System.out.println("val is "+resposneText);

Find the answer here